WO2007057517A1 - Reseau de communication - Google Patents

Reseau de communication Download PDF

Info

Publication number
WO2007057517A1
WO2007057517A1 PCT/FI2006/050498 FI2006050498W WO2007057517A1 WO 2007057517 A1 WO2007057517 A1 WO 2007057517A1 FI 2006050498 W FI2006050498 W FI 2006050498W WO 2007057517 A1 WO2007057517 A1 WO 2007057517A1
Authority
WO
WIPO (PCT)
Prior art keywords
communication network
accordance
base station
network
base stations
Prior art date
Application number
PCT/FI2006/050498
Other languages
English (en)
Inventor
Aarne Hummelholm
Original Assignee
Tellog Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tellog Ag filed Critical Tellog Ag
Priority to EP06808039A priority Critical patent/EP1961248A4/fr
Publication of WO2007057517A1 publication Critical patent/WO2007057517A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering

Definitions

  • the present invention concerns a novel mobile communication network and network topology and a method for designing and optimizing said network.
  • the traditional network topology in mobile communication systems is the so called cellular system.
  • base station covers a certain area, in other words cell.
  • the radius of the cell can range from a couple of meters in a building and couple of hundreds of meters in towns to tens of kilometers in the countryside.
  • the form of the cell is never a perfect circle or hexagon, but it depends on the environment (buildings, mountains, valleys, etc.), the weather conditions and sometimes even on the load of the system. Examples of this kind of systems include telecommunication systems (GSM, TETRA, UMTS etc.), in which the mobile station communicates within the area of the cell with the base station, and vice versa.
  • radio stations can be understood to operate with a cellular principle. In case of radio stations the cells are big and the transmitters are efficient. Cells used by telecommunication systems, however, are notably smaller. Traditionally, one base station provides the service option connections for the mobile station located in their respective cell area.
  • the meaning of the smaller cells used by the telecommunication systems is to provide a bigger capacity for the system.
  • By means of small cells it is possible to reuse frequencies. If a transmitter is far from another, for example outside the interference area, it can reuse the same frequencies. Because the most of the mobile phone systems assign frequencies to predetermined users, those frequencies are excluded from other users. The amount of frequencies is, however, not unlimited, and therefore the amount of simultaneous users of one cell is strictly limited. Multiple users are not enabled even by big cells. On the contrary, their number of users per square kilometer is smaller. This is also a reason why very small cells are used in cities, because there the number of mobile phone users is bigger.
  • small cells are also the decreasing of transmission power. Even though power considerations are not the biggest problem for base stations, they are a problem for mobile stations. A receiver located far from the base station needs much transmission power. In addition, small cells reduce local interference. If the distance between the transmitter and the receiver is long, even bigger interference problems occur. In small cells the mobile stations and base stations only need to deal with local interferences. J
  • small cells have the advantage of having spread and single components. Spread in this way they are not as easily damaged. If one antenna is damaged, it has effects on the connections only within a small area.
  • the first approach has been the grouping of the cells. Grouping means that the cells located next to each other do not operate with the same frequency, but between two cells operating on the same frequency there is always at least one cell using a different frequency. Traditionally one base station forms a service complex for its respective cell.
  • a sectorized antenna As described by its definition, the antennas are not non-directional, but they are divided in different sectors.
  • a cell can be sectorized for example into three or six sectors, whereby the reuse of frequencies is enabled.
  • a sectorized antenna is in practice a set of directional antennas connected to one point.
  • the purpose of the present invention is to provide a network topology comprising the benefits ) of the networks of the prior art but having the complexity of the present networks and the resulted disadvantages of design and implementation removed.
  • a covering network with backupping can be constructed without unnecessary overlappings (the user can use the stronger base station only), in other words, with as fiew interferences as possible and so that it can be easily designed and optimized.
  • This preferably quadratic cross-coverage area replaces i the traditional coverage area formed by the traditional one or a plurality of base station cells (i.a. micro- and picocells).
  • the purpose of the invention can be implemented by means of a cross-coverage method (RPMe). This means that unlike in traditional systems, the coverage and services of a plurality
  • > of directional antennas are directed to the terminal device or the mobile station instead of those provided by one directional antenna, and/or the coverage and services of a plurality of base stations are directed to the terminal device or the mobile station instead of those provided by one base station.
  • the terminal device of the user uses and gets the service from the base station or through the base station offering the best connection in terms of quality, or
  • the adjacent base stations can be connected with each other by means of narrow beam directional antennas, and by means of other directional antennas the base stations serve the users of the mobile stations.
  • Adjacent base stations can also be connected with each other for example by means of wired
  • a corner of each square comprises a base station.
  • this kind of a single base stations comprises transmitters (narrow beam directional antennas) being in connection with adjacent base statiosand i transmitters (directional antennas of about 90 degrees) being directed for example inside the square formed by four base stations in order to provide the frequencies required by the mobile stations.
  • these sevice squares required by the mobile stations can be directed to any direction. Also for example upwards and downwards, whereby for example the air traffic and the direction downwards from the base station can be served. For each direction, a respected
  • the invention can be a square or a parallelogram.
  • the network according to the cross- coverage method can also be formed of cubes or irregular cubes, that further can form grids, hi one preferred embodiment, the communication network in accordance with the invention can move, be in motion or move partially.
  • An advantage of the network according to the cross-coverage method in accordance with the present invention is that a vide coverage can be provided for the network with as few interferences as possible. Another advantage is that in case one radio transmitter of the network in accordance with the cross-coverage method fails, the area covered by this failed I radio transmitter still remains within the netword. In case a whole base station fails, the coverage of the adjacent base stations compensates the failed base station, and above all, no one of the base stations can be located in that way in a critical place, that its failure would prevent the operation of the network.
  • the user terminal in each square is connected to that base station, that can give the best possible sevice in terms of quality.
  • the user according to the cross-coverage method automatically utilizes another service of the base station directed to the area.
  • Cross-coverage areas squares can operate
  • Design of a network in accordance with the invention is simple, because the path attenuation of the radio wave is known in different circumstances and because it is not necessary to take the overlappings of different channels into consideration.
  • the size of a square of the network in accordance with the cross-coverage method can be easily calculated.
  • a square- related equation, modified based on the Erlang equation can be used for calculating the minimum capacity needed by the users.
  • the needed network capacity can be calculated in a i simple way, because for example a total communication capacity of 200 Mb/s for interfaces in simultaneous use will be offered to each square.
  • the terminal of the user selects, based on the quality and usability, the base station from the square that offers the best service.
  • the total capacity provided for the square can be filled.
  • the construction of the network enables the corresponding capacity for the uniform trunk traffic amount.
  • the cross-coverage method also serves the communication between the base stations.
  • the network in accordance with the cross-coverage method operates with a multiple backup.
  • the capacity per square can be increased by increasing the use of frequency resources with allowed blocking. When allowing blocking (by weakening the service quality), the amount of • simultaneous users can be increased.
  • This network topology also provides an easy dynamic management and allocation of frequency vessels according to the needs of the users.
  • the frequencies can be selected according to the situation and coverage requirements among a plurality of frequency bands, that can be used at the same time or separately to form the coverage areas according to the cross-coverage method.
  • This method provides a flexible management and control of base stations and user devices related to base station, coverage area or network. The connections out depend on the amount of communication, f.ex. if a connection of 1 Gb can manage 5 squares of 200 Mb/s each, no blocking occurs.
  • a big square formed house having a base station at each corner, whereby a radio transmitter of one sector, respectively, is directed to the inside the house.
  • the user is served by the base station having the best connection in terms of quality.
  • a network in accordance with the cross-coverage method can also act as operator of the communications between the base stations. This guarantees the multiple back-up for the communications between the base stations.
  • Figure 1 shows one preferred embodiment of the cross-coverage method in accordance with the invention, in this case a square.
  • Figure 1 shows at numeral 1 a base station point, that is a cross-coverage point, comprising directional antennas for the communication from one base station to another and the antennas for connecting the users.
  • Reference numeral 2 shows the beams of the antennas meant for connecting the user terminals to the communication network.
  • Reference numeral 3 shows the beams operating in the communication between the base stations.
  • One base station offers four separate beams 2a, 2b, 2c, 2d to the users.
  • the figure shows four base stations 1, forming in the middle a square-formed coverage complex. From these base stations, one directional antenna of each, respectively, is directed inside the coverage area complex.
  • each base station in principle corresponds to all the base stations. That is to say, that from each base station beam 2a, 2b, 2c, 2d is provided. In this Figure, however, only one beam is shown coming from each base station, with the exception of 2a.
  • the reference numerals of the beams 2a, 2b, 2c, 2d meant for the user terminals are shown so that their numeral is marked at the boundary of the coverage area of the respective directional antenna of 90 degrees, directed inside the square.
  • Reference numeral 2a is meant for better understanding of the coverage area of each beam, as it is repeated both in the first square left, and in the adjacent square on the right.
  • This kind of a square of the cross-coverage method is covered as a whole so that in the middle of the square there is the coverage area of the beam of each base station in the corners.
  • this middle area is designed so that there is the highest demand of services, and thus also the best offer of services.
  • Reference numerals 4 In the coverage area complex of the cross-coverage method, the user terminal always has a connection at least with two directional antennas anywere inside the square.
  • Reference numerals 4b show areas, where the coverage area of three directional antennas is extended.
  • Reference numerals 4c then represent the area of the highest service demand, where the coverage area of four directional antennas is directed to.
  • the network topology can be formed so, that each base station point 1 is in connection with all the nearest base stations.
  • a simple grid can • be formed, wherein the users are served with antennas of the base station points 1 of corners, said antennas being directed inside the respective square.
  • the base stations 1 are not in connection with all the adjacent base stations, but the cross-coverage method can act so that the nearest base stations i in certain corners are in connection with each other by means of beams 3. Base stations in certain other corners, in turn, are not necessarily in connection with adjacent base stations. At an advantageous location, and suitable for the respective environment, the networks formed in this way superposed can be connected with each other.
  • the cross-coverage method can be implemented so that antennas directed upwards and downwards are added for communication between the base stations.
  • the coverage area of the network can be expanded towards a matrix model.
  • the directional antennas meant for serving mobile users can be directed upwards and downwards, whereby an even more diversified coverage area of the communication
  • the cross-coverage method can also be a so-called matrix model.
  • two network topologies are connected with each other superposed by means of networks directed upwards and downwards, hi that way a network covering a very ) large area can be constructed to any direction so that a failure of a single base station point or a radio transmitter comprising a base station point is not critical.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un réseau de communication mobile et une topologie de réseau novateurs ainsi qu'un procédé de conception et d'optimisation du réseau. Selon l'invention, on utilise au lieu d'une antenne directionnelle la couverture et les services d'une pluralité d'antennes directionnelles et/ou au lieu d'une station de base, la couverture et les services d'une pluralité de stations de base pour le terminal utilisateur.
PCT/FI2006/050498 2005-11-16 2006-11-15 Reseau de communication WO2007057517A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06808039A EP1961248A4 (fr) 2005-11-16 2006-11-15 Reseau de communication

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20051170A FI20051170L (fi) 2005-11-16 2005-11-16 Viestintäverkko
FI20051170 2005-11-16

Publications (1)

Publication Number Publication Date
WO2007057517A1 true WO2007057517A1 (fr) 2007-05-24

Family

ID=35458776

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2006/050498 WO2007057517A1 (fr) 2005-11-16 2006-11-15 Reseau de communication

Country Status (3)

Country Link
EP (1) EP1961248A4 (fr)
FI (1) FI20051170L (fr)
WO (1) WO2007057517A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10200960B2 (en) 2015-09-22 2019-02-05 Corning Optical Communications Wireless Ltd Remote antenna unit (RAU) with multiple antenna assembly in a distributed antenna system (DAS)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5564121A (en) * 1994-08-18 1996-10-08 Northern Telecom Limited Microcell layout having directional and omnidirectional antennas defining a rectilinear layout in a building
US6085092A (en) * 1991-12-16 2000-07-04 Detecon Deutsche Telepost Consulting Gmbh Method for improving the radio cell illumination in a cellular mobile radio system and apparatus for carrying out the method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6052599A (en) * 1997-01-30 2000-04-18 At & T Corp. Cellular communication system with multiple same frequency broadcasts in a cell
US6707798B1 (en) * 2000-03-31 2004-03-16 Ensemble Communications Method and apparatus for reducing co-channel interference in a frame-synchronized wireless communication system
US6879845B2 (en) * 2000-12-01 2005-04-12 Hitachi, Ltd. Wireless communication method and system using beam direction-variable antenna

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6085092A (en) * 1991-12-16 2000-07-04 Detecon Deutsche Telepost Consulting Gmbh Method for improving the radio cell illumination in a cellular mobile radio system and apparatus for carrying out the method
US5564121A (en) * 1994-08-18 1996-10-08 Northern Telecom Limited Microcell layout having directional and omnidirectional antennas defining a rectilinear layout in a building

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1961248A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10200960B2 (en) 2015-09-22 2019-02-05 Corning Optical Communications Wireless Ltd Remote antenna unit (RAU) with multiple antenna assembly in a distributed antenna system (DAS)
US10420045B2 (en) 2015-09-22 2019-09-17 Corning Optical Communications LLC Remote antenna unit (RAU) with multiple antenna assembly in a distributed antenna system (DAS)

Also Published As

Publication number Publication date
EP1961248A1 (fr) 2008-08-27
FI20051170L (fi) 2007-05-17
FI20051170A0 (fi) 2005-11-16
EP1961248A4 (fr) 2009-12-02

Similar Documents

Publication Publication Date Title
US8918108B2 (en) Methods and systems for frequency reuse in multi-cell deployment model of a wireless backhaul network
Sarnecki et al. Microcell design principles
US6553234B1 (en) Method of frequency reuse in a fixed access wireless network
AU694599B2 (en) Dynamic channel allocation for sectorized radio access units of a mobile communication system
WO1990003088A1 (fr) Systeme de communication cellulaire a secteurs dote d'une grande capacite
CN111787578B (zh) 移动通信网络的组网系统、方法及终端接入方法
US6542746B1 (en) Frequency reuse scheme for point to multipoint radio communication
US5603083A (en) Microcell base station antenna pattern for dense urban areas
JP2006506922A (ja) 時分割及び二重自己編成型モバイル通信システムを確立する方法
US6393302B1 (en) System and method for increasing capacity of a cellular network by cell site reconfiguration
Leone et al. Towards reliable mmWave 6G RAN: Reconfigurable surfaces, smart repeaters, or both?
Pijnappel et al. Drone-assisted cellular networks: Optimal positioning and load management
US6127988A (en) Fixed wireless base station antenna arrangement
CN107615802A (zh) 宏辅助异构网络中用于测量以及连接控制的方法以及装置
US6961580B2 (en) Wireless communication system and method of maximizing the use of communication signal resource
WO2007057517A1 (fr) Reseau de communication
Dehghan et al. Small cell city
CN114641008B (zh) 宽带接入方法、设备及系统
US7221962B2 (en) Telecommunications radio system for mobile communication services
EP1940049B1 (fr) Procédé de planification pour système de communication à relais sans fil à plusieurs sauts, et système correspondant
US5812956A (en) Clustered antennas in a cellular communication system and method of deploying the same
WO1998043363A1 (fr) Procede pour regenerer des signaux lmds et noeud pour ledit procede
CN107205283A (zh) 一种回程通道的建立方法及装置
US6038454A (en) Method for densifying a transmitter and receiver network for mobile telephony
Mishra et al. Analysis of Co-channel Interference under various Radio Propagation Environment

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
NENP Non-entry into the national phase

Ref country code: DE

REEP Request for entry into the european phase

Ref document number: 2006808039

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2006808039

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 2006808039

Country of ref document: EP